Verduzco is accused of shooting Karina Morales-Rodriguez and Marta Martinez, as they opened the store in 2016.

Defense experts say Verduzco shares genes linked to schizophrenia with other relatives diagnosed with the illness, and say Verduzco has been diagnosed with paranoid schizophrenia, obsessive-compulsive disorder and depression.

To be admitted as evidence, a scientific principle has to be widely accepted by scientists, but prosecutors say that’s not the case here.